Zoysia clean-up 2023

     Over the past several years we have applied a combination of non-selective post-emergent herbicide as well as pre-emergent herbicide during the dormancy period of the zoysia. For years this process worked well. What we have found recently, however, is that we have developed resistant Poa Annua that is unaffected by even the highest rates of this herbicide.  

This is an example of how the herbicide was not controlling all of the undesirable turf this past year.

 

Without getting good control of the poa over the winter, the zoysia goes into the season with unwanted competition and is weakened in areas. 

    This year we have completely changed our approach with all new chemistries. Instead of the post-emergent glyphosate (roundup), we have switched to a different, stronger non-selective glufosinate (finale). In addition to this change, we have switched our pre-emergent herbicide to a much more effective combination product that utilizes Imazaquin, Prodiamine, and Simazine.

So far, the very early activity of the new combination seems to be exceptionally effective.

We look forward to seeing how well we can clean the zoysia up this year to have healthy, and aesthetically pleasing fairways and tees.